# math

posted by
**tracy10**
.

Can someone give me the formula to work this out, I am not sure.

Find the value of t for the difference between two means based on an assumption of normality and this information about two samples. (Use sample 1 - sample 2. Give your answer correct to two decimal places.)

Sample Number Mean Std. Dev.

1 25 38.6 13.7

2 29 42.1 10.2